Bellevue Hospital bosses are raiding the coffers of a charity that helps its patients.

The Bellevue Hospital Auxiliary is losing revenue it received from the hospital’s gift shop, coffee shop and parking garage — money that had flowed to the nonprofit group for decades. Last year, the cash came to more than $800,000.

“It was our major source of funding,” said Patricia Blau, the group’s president.

The auxiliary used the money to pay for a patient library and a clothing room, which distributed free clothing to 6,600 patients last year. It also funded art and music therapy, recreational activities for psychiatric patients and stipends for interpreters and chaplains.

The organization served more than 41,000 patients in 2008, Blau said.

Louise Dankberg, head of the Bellevue Community Advisory Board, a citizens group, called the funding cuts “shameful.”

But hospital officials say they’re facing a $40 million budget shortfall — and “there is a serious need to scrutinize all sources of revenues.”